Combined stove-pipe thimble and ventilator



.. NITEVDI STATES P TENT OFFICE EDWARD J. COLBY, OF CHICAGO, ILLINOIS.

COMBlNEDSTOVE-PIPE THllVlBLE AND VENTILATOR. I

SPECIFICATION forming part of Letters Patent No. 418,783, dated January 7, 1890;

' Application filed December 4, 1888. Serial No. 292,651. (No inodel.)

To all whom it may concern:

Be it known that I, EDWARD J. COLBY, a citizen of the United States, and a' resident of Chicago, county of Cook, and State of Illinois, have invented a new and useful Improvement in Combined Stove-Pipe Thimbles and Ventilators, of which the following is a specification.

the rear aperture B and front apertures C C.

The lower chamber has the rear aperture D and front aperture E, the latter having a somewhat greater diameter than the former. About this aperture E is formedthe flange F, and within the chamber A and leading from the aperture E to the wall of the case about the aperture D are the guides G G. The

' byit' may be rotated in either direction.

flange F has a lowerprojection H. The cham-' bers A and A are separated by the diaphragm J K is a bead about the front.

L are bars or bead-work across the front to separate the apertures C Q M is a transverse rod in the upper. partof the chamber A journaled in the sides of the case and carrying at its outer end the beveled gear N, which meshes with the gear 0 on the rod P. This rod is supported in the bearings R B. This latter rod is provided with the collar S, to keep it from descending, and terminates below in the hand-wheel T, where- It is tightly journaled, so as to remain in the position to which it is turned and thus hold the flap U in any desired position.

V is a lug on thetop of the flange F,'to-

which is pivoted the binding-flap V. At the lower edge of the aperture B is the guardledge WV. The flap V is shaped as shown in Fig. l, and is pivoted at the pivotal point V to the lug V, and has an outwardly-projecting end V The rod X is supported, so as to be vertically reciprocated in the bearings X X and has a lug X at its upper end to limit its downward descent. Pivoted to this rod is a link X, which is also pivoted to the lug X on the flap U.

The use and operation of my invention are as follows: The device, constructed substantially as shown, is placed in a prepared aperture in the breast-wall of the flue, the front of the case A being flush with the inside of the wall, and the rear wall of the chamber A being about flush with the inside ofthe flue. The stove-pipe is inserted through the aperture E and chamber A its lower edge resting upon the projection H and flange F, and being protected by the guides G G, and directed against the back Wall of the chamber A about the aperture D. The flap V is now dropped down into the position shown in Fig. 2 iufull lines, Where it encircles the upper part of the pipe and holds it securely in position. I call this a pipe-securing flap. Now, when it is desired to operate the ventilator, thehand-wheel T,being turned, causes.

the rod P to turn, and thus the rod M to rotate and the flap U to move-as, for instance, in the position shown in Fig. 2. The products of combustion pass through the lower chambar A, as indicated by the figure, and the air which it is desired to remove from the apartment passes from the upper chamber A. The smoke getting into the flue is guarded away from the aperture B by the ledge W. The flap U operates as a sort of movable partition. The lower chamber A 'does not in any manner connect with the upper chamber, so that no smoke can pass into the latter, and the lower chamber may be cleaned without interfering withthe upper.

The flap V is adapted to encircle the upthe pipe is pushed in it gives away and moves in the direction indicated in the dotted lines. When the pipe is in position, it drops back or may be forced back into the position shown in full lines, where it securely holds the pipe, and any attempt or tendency to withdraw the pipe has the efiect of looking it more securely. \Vhen the appliance is so situated that the rod, which, with its gears, is shown in Fig. 1, cannot be used, I substitute therefor the construction shown in Fig. 2. The rod X is a vertically-reciprocating rod operated from below by the knob or hand-piece T, and as it is raised the link X will tend to fall into the position parallel with the rod and thus permit the flap U to return,so as to close the aperture 0. \Vhen the rod is drawn, as indicated in Fig. 2, the flap is thrown outward and the aperture is opened.

I claim 1. In a combined stove-pipe thimble and ventilator, a case having a lower chamber open at both sides through which passes the withdrawal.

EDWARD J. COLBY. Vitnesses:

FRANCIS W. PARKER, GEO. C. DARCHE. 

